package com.anyou.mall.scancode;

import com.google.zxing.common.BitMatrix;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;

/**
* 配置图像写入器
*
* @author 18316
*
*/
public class MatrixToImageWriter {
    private static final int BLACK = 0xFF000000;
    private static final int WHITE = 0xFFFFFFFF;

  private MatrixToImageWriter() {
    }

   public static BufferedImage toBufferedImage(BitMatrix matrix) {
                int width = matrix.getWidth();
               int height = matrix.getHeight();
               BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
               for (int x = 0; x < width; x++) {
                        for (int y = 0; y < height; y++) {
                               image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);
                           }
                   }
               return image;
    }

  public static void writeToFile(BitMatrix matrix, String format, File file) throws IOException {
                BufferedImage image = toBufferedImage(matrix);
              if (!ImageIO.write(image, format, file)) {
                      throw new IOException("Could not write an image of format " + format + " to " + file);
                   }
  }
    public static void writeToStream(BitMatrix matrix, String format,
                                     OutputStream stream) throws IOException {
        BufferedImage image = toBufferedImage(matrix);
        if (!ImageIO.write(image, format, stream)) {
            throw new IOException("Could not write an image of format " + format);
        }
    }
}
